Working on issue #1161 - Broken error handing for unaccessable comment attachments.

lib/import/zendesk/ticket/comment/attachment.rb

@@ -3,7 +3,7 @@ module Import
     class Ticket
       class Comment
         class Attachment
-          extend Import::Helper
+          include Import::Helper
 
           def initialize(attachment, local_article)
 
@@ -35,6 +35,7 @@ module Import
             )
             return response if response.success?
             log response.error
+            nil
           end
         end
       end